The Zoom B1 gives you a tremendous selection of effects and amp models for an incredibly low price! The B1 employs Zoom’s ZFX-3 DSP chip and a 96kHz sampling rate to deliver amazingly accurate models of tube harmonics. Its 24-bit AD/DA conversion offers excellent dynamic range. The B1 provides a variety of effects categories: Comp/Limit, EFX, Drive, EQ, ZNR/Amp modeling, Modulation, and Reverb, and it’s loaded with 40 presets. The B1 will run for up to 12 hours continuously on four AA batteries and comes with an included AC adaptor.